Malicious PDF — malware analysis report

Static analysis result for SHA-256 94ab07214b640ab9…

MALICIOUS

PDF

74.3 KB Created: 2021-09-02 14:59:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a409976ad5b7c3d1edad648cd4381f37 SHA-1: 72c813834442c6cb46be59aa8029847fd475d914 SHA-256: 94ab07214b640ab979cd018a10dc0b92dd20f19e696fbd6ac063db3f8b50e3d0
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains a lure to install a browser extension or update, which is a common social-engineering tactic. The document also contains numerous URLs pointing to potentially compromised websites, suggesting it may be part of a phishing or malware distribution campaign. No scripts were extracted, but the presence of external links and the nature of the lure indicate a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://airsoft1.ro/files/file/fetorowupenaxorojari.pdf In PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ba7ca03e9e7---80047890167.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/13838b6257586712b7e3fafd4894a8ac/domanibitigonawun.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b7d117ceec.pdfIn PDF document text
    • https://giraffeng.net/infodaily/gen-ckfinder/userfiles/files/wejadoxanafup.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160eda9f321871---relipelojenoxojofaguku.pdfIn PDF document text
    • http://datavincity.com/uploads/ckfinder/files/vakibusejus.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/rubomofipikanepovadebusaz.pdfIn PDF document text
    • http://knowleangling.co.uk/ckfinder/userfiles/files/42346374590.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/kenovozugekogobivatud.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/082b118dec10bab07ad86d07c70a1a1c/kamusikoxodegulezi.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/36poceph5o0trvb9h96l31h8tu/96445592102.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607df5401c73f---sasaju.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/is3qrtpvjgvss3uujtv2s9undr/51282721096.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f3a77a007---97381704273.pdfIn PDF document text
    • http://vivaibonomo.it/userfiles/files/fogitarijuvaxunago.pdfIn PDF document text
    • http://numere-mopede.ro/mm/file/muxupakajuvunuwimotasi.pdfIn PDF document text
    • https://cortopolis.ar/userfiles/file/34757271718.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/e0d3f1083725e7e5d851bb1d10e6a6bd/36404387171.pdfIn PDF document text
    • https://cncunse.com/d/files/zobimexivifomuwira.pdfIn PDF document text
    • https://la-klamm.org/Files/files/kipijokowiwoguv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=timpanismo+gasoso+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF39 10428 bytes
SHA-256: 632a832ad3f8276d001b0a7b515b20fff5ee33732fcec8a417e5c46da59a8996
font_01_sfnt_off0000d696.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD696 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA8 17604 bytes
SHA-256: 837ed67587ef4b1af80e6a9052efb22ba5616495e13cdd792bdd5f8d4321d246

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